20120501 has 2 divisors, whose sum is σ = 20120502. Its totient is φ = 20120500.

The previous prime is 20120491. The next prime is 20120509. The reversal of 20120501 is 10502102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 9296401 = 3290^2 + 3049^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120501 - 2⁶ = 20120437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060250 + 10060251.

It is an arithmetic number, because the mean of its divisors is an integer number (10060251).

Almost surely, 2^20120501 is an apocalyptic number.

It is an amenable number.

20120501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120501 is an equidigital number, since it uses as much as digits as its factorization.

20120501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 20120501 is about 4485.5881442683. The cubic root of 20120501 is about 271.9858205195.

Adding to 20120501 its reverse (10502102), we get a palindrome (30622603).

It can be divided in two parts, 201 and 20501, that added together give a palindrome (20702).

The spelling of 20120501 in words is "twenty million, one hundred twenty thousand, five hundred one".